Automatic relief-valve



(No Model.)

' B; O. TYLER.

Automatic Relief-Valve.

No. 228,493; Patented June 81,1880

Mffiwmes: I [lave Zion- N. PETERS, PHOTO-UTHOGRAPHER, WASQXNGTON D O Unrrnn STATES PATENT rrrcn,

BENJAMIN O. TYLER, OF TRENTON, NEW JERSEY.

AUTOMATIC RELIEF-VALVE.

SPECIFICATION forming part of Letters Patent No. 228,493, dated June 8, 1880.

Application filed April 30, 1880. (No model.)

To all whom it may concern:

Be it known that I, BENJAMIN O. TYLER, a citizen of the United States, resident at Trenton, in the county of Mercer and State of New Jersey, have invented certain new and useful Improvements in Automatic Relief- Valves 5 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which'it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention has for its object to provide an automatic relief-valve for steam-cylinders; and it consists in the construction and arrangement of the several parts hereinafter described, and pointed out in the claim.

In the drawings, Figure 1 is a side view of the shell or case. Fig. 2 is a vertical longitudinal section of the shell, showing the valve and other mechanism; and Fig. 3 is the valve.

a is the shell, formed with the enlargement a, within which is the enlarged rectangular chamber (o The shell is provided with a tapering end, a around which is cut a thread,

as shown, by means of which it can be secured to the cylinder-head or steam-pipe. On the opposite end there is formed a screw, a, adapted to receive the screw-cap a The shell is also provided with nipple a, through which is formed the exit-port a, connecting with the chamber a To the nipple c the drain-pipe is attached.

In the screw-cap a there is formed the central round recess, b, corresponding to the end chamber, 0, in the end a of the shell.

(Z is a circumferential collar formed on the inner side of the shell, and between the central chamber, a and the end chamber, 0. Between this collar and the cap are the chambers b and c, which together form one continuous chamber with smooth regular sides, in which I place the spiral spring 0.

f is the valve-stem, which is constructed with a solid head, f, which fits snugly into the chamber 0 and against the collar (Z. The spiral spring cbears on the head f, as shown.

To put the stem f into the shell the cap a and spring 0 must be removed. The stem is then inserted through the chamber 0. The spring and cap being replaced, the stem is held firmly in its position and cannot drop out nor get out of place.

The stem is constructed with a series of radial wings, f which touch the inner sides of the shell and prevent any lateral movement of the outer end thereof.

The end of the stem projects out of the shell and has formed on it an enlargement or shoulder, f from which projects the central threaded pin, f which holds the adjustable valve g. The valve 9 may be turned onto the pin f tight against the shoulder f, or it may beset outward from said shoulder, so as to increase the throw or distance which the valve must be moved to stop the exit of steam. The valve g is seated in the end of the hollow stem or end a of the shell.

In the device the spring 0 is entirely separated from the stem of the valve, it being in the chamber formed in the cap and end a of the shell, and bearing directly on the head f, and, being in no wise interfered with by the valve-stem, is entirely free, and will always act instantly and efficiently to open the valve when the steam-pressure is taken off. The tension of the spring may be increased or diminished by turning the cap a farther onto or off the end a.

The valve g may be set farther out on the pin f if it is desired to increase the distance to which it must be moved before it closes against the end of the shell.

I am aware that relief-valves have been made in which there has been shown a construction similar in many respects to that shown in my device.

I am aware that a patent has been granted to E. WValter, hearing date February 2, 1875,

and numbered 159,483, in which there is a valve-stem having a fixed head on its outer end, while its inner end is slightly reduced in size and passes through a washer or disk and through the spring. I do not claim the insion, (1,, provided with the collar (1, a chamber,

0, the screw-cap a having the chamber 12,001- responding to the chamber 0, the valve 9, seated on the end a and having a ste1n,f, provided with a solid head, f, and the spring 0, bearing directly on the end or head f of the valve-stem, all constructed and arranged substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 27th day of IO April 1880.

BENJAMIN o. TYLER.

Witnesses:

J. E. BoDINE, CHARLES C. REED. 

